removable devices auto umounting
pcloches at gmail.com
Thu Mar 20 02:08:16 PDT 2008
What about a "Safely Remove Hardware"-style icon on your desktop,
which could simply run a script to unmount (with force if the user has
it open somewhere).
On 20/03/2008, Roland Smith <rsmith at xs4all.nl> wrote:
> On Thu, Mar 20, 2008 at 11:55:32AM +1000, Da Rock wrote:
> > I'm just looking into the removable device issue for freebsd. I can see
> > its easy enough to auto mount a removable device (although I could use
> > some help getting sd/xd devices working with my card reader), but the
> > removal seems to come unstuck.
> > I have some barely literates on my systems, so I do need to work this
> > out. Is it possible to use a forced umount to do this? What are the
> > options here?
> In short, no. Removal of a USB device would be forwarded to devd(8). But
> since the device is no longer there at that moment, you cannot unmount
> it anymore. You might get a nice kernel panic for your efforts, though. ;-)
> The FreeBSD disk subsystem was simple not written with removable devices
> in mind, because they didn't exist back then. Until that code is fixed
> (which is hard) you _have_ to unmount before you pull the device out.
> One (not bullet-proof) workaround might be to use the automounter
> [amd(8)], and have it unmount very quickly after they stop being
> active. This requires setting both the 'cache_duration' and
> 'dismount_interval' options in amd.conf(5) to very low values.
> R.F.Smith http://www.xs4all.nl/~rsmith/
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